The national team-mates will come up against each other in Barcelona v Man City clash.
Arguably the biggest tie of the Champions League last-16 is to reach its conclusion as Barcelona host Manchester City in the second-leg.
The Spaniards hold a two goal advantage after beating the Citizens 0-2 at the Etihad Stadium three weeks ago and are favourites to progress to the quarter-finals.
One of the big talking points however will be which one of the talented Argentina internationals on display – Lionel Messi and Sergio Aguero – will prove to be the crucial factor in the outcome of the game.
Both South Americans have been injured for large chunks of the current campaign and therefore have not been as influential as perhaps they or their managers would have liked.
Whilst Messi is a four-time Ballon d’Or winner and is regarded as one of the finest footballers of all time, it’s all about current form and here is a comparison and analyis of the attacking duo in 2013/14.